Remove Enqueuer.nativeEnqueuer

pkg/compiler/lib/src/js_emitter/native_emitter.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.js_emitter.native_emitter;
 
 import '../common.dart';
 import '../compiler.dart' show Compiler;
 import '../elements/types.dart' show DartType, FunctionType;
 import '../elements/entities.dart';
@@ skipping 190 matching lines @@
         cls.nativeLeafTags = leafTags[cls].toList(growable: false);
       }
       if (nonleafTags[cls] != null) {
         cls.nativeNonLeafTags = nonleafTags[cls].toList(growable: false);
       }
       cls.nativeExtensions = extensionPoints[cls];
     }
 
     // Add properties containing the information needed to construct maps used
     // by getNativeInterceptor and custom elements.
-    if (compiler.enqueuer.codegen.nativeEnqueuer.hasInstantiatedNativeClasses) {
+    if (backend.nativeCodegenEnqueuer.hasInstantiatedNativeClasses) {
       fillNativeInfo(jsInterceptorClass);
       for (Class cls in classes) {
         if (!cls.isNative || neededClasses.contains(cls)) {
           fillNativeInfo(cls);
         }
       }
     }
 
     // TODO(sra): Issue #13731- this is commented out as part of custom
     // element constructor work.
@@ skipping 142 matching lines @@
     // satisfy a check against [element], in which case an interceptor must be
     // used.  We should also use an interceptor if the check can't be satisfied
     // by a native class in case we get a native instance that tries to spoof
     // the type info.  i.e the criteria for whether or not to use an interceptor
     // is whether the receiver can be native, not the type of the test.
     ClassEntity cls = element;
     if (nativeData.isNativeOrExtendsNative(cls)) return true;
     return isSupertypeOfNativeClass(element);
   }
 }